I'm using a real wiimote with a USB bluetooth adapter, with Toshiba stack v9.10.15T, and Dolphin v4.0.2. Everything works perfectly fine for one of my computers (i5-3570k, Radeon 7950, 8gb ram), however, for some reason i'm finding a slight wiimote delay playing the same games under the same exact settings for my other computer (i5-4670k, Radeon 7870, 8gb ram). It's hard for me to believe computer specs are the issue since the processor would seem to be a little bit better, and the video card much more powerful than needed. Any ideas as to what could explain the difference?

Well I've identified the issue, the problem is tv input lag. The problematic PC was using a LCD tv (Sony KDL-46EX700) as a display, and after testing it with a monitor I found it to work flawlessly. Though the tv has a "game mode", it does not resolve the issue completely as the lag is still quite noticeable. I guess there is not much that can be done about that.